Good for a few monthsBy Caseyon 12/20/2014

Casey wouldn't recommend this product to a friend

My second Ato has stopped working. When the unit works, it's great.
When the first one stopped working, I reached out to BRS and Tunze. I learned that I was basically S.O.L without sending the unit back to them. I just decided to spend the money and buy a replacement.

That was a workable plan for a few months until the second unit died on me. I've decided not to buy another. I'd rather pour the RO water in myself than purchase yet another unreliable model from BRS. I hope they find a more reliable nano ATO to promote.

Works well fills needBy Thomason 12/9/2014

Thomas would recommend this product to a friend

Bought this to top off my nano tank. Set up was easy and does a good job maintaining water level. Lot less hastle than topping of tank daily and keeps salinity more stable

Can't imagine how I lived without this thingBy Seanon 12/4/2014

Sean would recommend this product to a friend

No more lugging around jugs every other day, now it's only once every couple weeks! :) This is a huge upgrade and peace of mind. I have a small tank so this is huge in helping me keep my water parameters stabilized. This is a must-have for smaller reef tanks for people serious about their corals.

Works greatBy Meatonon 11/19/2014

Meaton would recommend this product to a friend

Perfect for my nano cube 28G reef tank

Compact. Works well. By Josephon 10/29/2014

Joseph would recommend this product to a friend

The unit is very compact, works well, and maintains your water level with frequent small top offs.

My only complaint is the pump doesn't have a suction or bracket so that it sticks to the bottom/side of your reservoir bucket.

Replaced Hydro-fillBy peteron 10/7/2014

peter would recommend this product to a friend

I owned the IM Hydro-fill for about 6 months when the controller went out. I've only had the Tunze running for a couple of weeks but I like it better already. Triggers from slight water level drops and I like the idea of the built-in fail safe.
Only complaint is the pump is pretty loud.

14days DeadBy Richardon 9/12/2014

Richard wouldn't recommend this product to a friend

problem for the controller pump not working

Great SystemBy Johnon 8/13/2014

John would recommend this product to a friend

Works great with my 38 gallon

14 months deadBy Jasonon 7/2/2014

Jason wouldn't recommend this product to a friend

Dead after 14 months. pump is fine brain unit doesnt work anymore.

Great product very reasonably pricedBy Randyon 5/30/2014

Randy would recommend this product to a friend

Love this little ATO system, and it's affordable for a Tunze product! I've had it for a week and it has been absolutely reliable with no fluctuation in my water level. My sump is a 10g aquarium with a heater, skimmer, and return pump all packed in, so it is a tight fit but it works. I left the cardboard separator between the two magnets because I had read that the magnets being too close can interfere with the float valve. It works like a charm and I couldn't be happier! Best $100 I have spent on my aquarium so far!

To the Top!By Taiaon 5/21/2014

Taia would recommend this product to a friend

Tunze has a great product here! It has been working flawlessly to keep my tank topped up and my levels much more stable. It's really one of the most essential pieces of equipment you can buy, it's well made, but my only gripe is the quick connect from the pump to the controller itself. I'd prefer something a bit more salt creep proof! But overall, I'll be buying another one for my next tank as well!

ATO for my nanoBy charleson 5/12/2014

charles would recommend this product to a friend

installed this ATO on my 28 gal.nano cube.so far it's working great.now my cheap protein skimmer works a lot better because of the constant water level.pump's a little loud so I suspended just above bottom of container and now it's quiet.doing great so far.